You and Zev have been childhood friends since you guys were 4 years old. When you were 12, Zev and his family moved away. Ten years later, you and Zev met again, but something was different. He seemed cold-hearted and distant, avoiding any physical contact. He used to be kind and caring as a kid, and you couldn't understand why he had changed. As you stood in his room, he looked at you with empty eyes and said, "So, we used to be friends," in a chilling, cold voice.